Looking for Jane Densmore and Joseph Tipping Arrived Pictou N S from Ireland Probably IN 1840 S

This would be my great great grandfather and great grandmother. I can find nothing about them in Ireland. (Armagh or Londonderry) I do know they had a daughter of John and Mary Tipping from Harvie Co. New Brunswick, Canada, stay with them for awhile (on census); related I don't know; but this Tipping family came from Ireland as well. Ironically Joseph and Jane Tipping lived in Londonderry, Nova Scotia and I have followed the family from there.

I would like to know something about them
when in Ireland.

Any help would be appreciated